Electric switch.



G. N. LEMMON.

ELECTRIC SWITCH.

APPLICATION FILED FEB. 1, I915.

1,219,470. Patented Mar. 20, 1917.

d S 3' A f 7 w C A C )2 1 WITNESSES. INVENTOR.

,l hgi i GEORGE N. LEMMON, 0F GREENSBURG, PENNSYLVANIA.

ELECTRIC STRETCH.

Annlicationfiled Februar 1 i915.

To all whom it" may concern."

Be it known that l Gnoncn N. LEMMON, a citizen of the United States, residing Greensburg, in the county of Vfestmoreland and State of Pennsylvania, have invented a new and useful Electric Switch, of which the following is a specification.

My invention relates to a switch for controlling electric currents and. its object is to provide a simple and eii'ective means of securing contact between a solid metal surface and a metallic flexible brush opposed thereto.

The priority of Letters Patent issued to A. N. Burke i7: 1,099,421 is acknowledged, and all claims are made subject to the claims granted therein.

@n the attached drawing, Figure 1 shows a side view of a switch embodying my invention. Fig. 2 shows'a top view of the conducting members of the switch with the contact-making parts not quite in contact. Fig. 3 shows a top view of the conducting members fully in contact with the switch closed.

A switch embodying my invention is shown in Fig. 1 of the attached. drawing. The base, a, carries a movable support, 7). Insulators, c, c, c, are supported on these members and in turn support the conducting parts above. The movable member, (Z, carrise a contact-member, e, which has a contact surface, g, and interlocking parts, m, m, and which is pivotally attached to the movable member, (Z, by the joint, 07,. The member e is limited in its motion about the pivot between the two positions shown in Figs. 2 and 3. This may be done by stops, 9, p, or by -other means. A spring, 3, keeps 6 normally in the position shown in Fig. 2. The stationary conducting member, j, carries a flexible contract brush, h, and interlocking parts, it. p

The operation is as follows As the switch, I), closes, the interlocking parts, m, m, engage with the part, is; as shown in Fig. 2; further motion produces pivotal motion of the contact member, 6, about the pivot, n, the surface, 9, approaches and comes into forcible contact with the brush, it; and the parts 171., m, be

come interlocked with the part, k, as shown Specification of letters latent.

Patented Mar. 20, 1917.

Serial 1%. 5,561.

i i 3. An essential part of the opera tion is the togglejoint action which is secured by the motion of the part 6 about its pivot, n, thereby bringing (2 into approximate alinement with the member (Z and producing heavy pressure between the parts and it, with relatively small rotative effort applied to the member When the switch is opened the parts m, m, remain interlocked with the stationary part, is, until the contact member, 6, has partially moved about its pivot, n, and the contact surface, g, has become released from its contact with the brush, it.

The essential feature of my invention is the pivotal action of the member, 6', which thereby produces forcible contact between the surface, 9, and the brush, it, and interlocks the parts, m, m, 70. The brush, it, and the surface, 9, may be interchanged with one another; also the member, 6, may be pivotally mounted on, f, and the members, Fe, h, be mounted on the member, (if, and such modifications do not change the essential feature of my invention.

I claim:

1. An electric switch having in combination a stationary insulated support, a rotative insulated support, a conducting member mounted on each of these supports, a flexible contact-making brush, mounted on one of these conducting members, and a contactmaking member pivotally mounted on the other conducting member and extending as a continuation of the conducting member upon which it is mounted, toward the other conducting member.

2. An electric switch having in combination a stationary insulating contact-supporting member, a rotative insulating contactsupporting member, and a contact member pivotally mounted on one of these supports and capable of limited motion about its pivot and of securing toggle-joint action in com: bination with a contact member on the other support.

3. In an electric switch, a pair of cooperating contact members, two pivoted levers arranged to form a t0ggle-lever, one of, said contact members being carried by one of said pivoted levers, and cooperating interg3. emme locking members one connected to each conmember, anol cooperating interlocking memtact member. 7 bers, one connected to each contact member. &. In an electric switch a fixed contact G. N. LEMMQN. member, a movable contact member, a pair Witnesses: v of pivoted; levers forming a toggle, one of C. H. WILLIS, said levers carrying said movable contact B. W. KERR. 

